WMS layer (URL)

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Sample viewer app

Display a WMS layer using a WMS service URL.

WMS layer (URL) sample

Use case

WMS is an OGC standard for displaying maps from images that are dynamically-generated on a web server. WMS is particularly useful for data that changes frequently, contains cartographically complex detail, or requires an open source data standard.

How to use the sample

The map will load automatically when the sample is opened. Pan and zoom to explore.

How it works

Create an AGSWMSLayer specifying the URL of the service and the names of layers you want to display. Note: The name comes from the Name property, not the Title property. On many services, the title is human-readable while the name is a numeric identifier.
After the AGSWMSLayer loads, add it to the map's operationalLayers array.

Relevant API

AGSMap
AGSMapView
AGSWMSLayer

About the data

This sample uses a U.S. National Weather Service radar map. Because WMS services generate map images on-the-fly, this layer is always up-to-date with the latest NOAA NEXRAD radar observations.

Sample Code

WMSLayerUsingURLViewController.swift
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// Copyright 2017 Esri.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

import UIKit
import ArcGIS

class WMSLayerUsingURLViewController: UIViewController {
    @IBOutlet private weak var mapView: AGSMapView!

    override func viewDidLoad() {
        super.viewDidLoad()

        // initialize the map with a light gray basemap
        let map = AGSMap(basemapStyle: .arcGISLightGrayBase)

        // assign the map to the map view
        mapView.map = map
        mapView.setViewpoint(AGSViewpoint(latitude: 39, longitude: -98, scale: 3.6978595474472E7))

        // a URL to the GetCapabilities endpoint of a WMS service
        let wmsServiceURL = URL(string: "https://nowcoast.noaa.gov/arcgis/services/nowcoast/radar_meteo_imagery_nexrad_time/MapServer/WMSServer?request=GetCapabilities&service=WMS")!
        // the names of the layers to load at the WMS service
        let wmsServiceLayerNames = ["1"]

        // initialize the WMS layer with the service URL and uniquely identifying WMS layer names
        let wmsLayer = AGSWMSLayer(url: wmsServiceURL, layerNames: wmsServiceLayerNames)

        // load the WMS layer
        wmsLayer.load { [weak self] (error) in
            if let error = error {
                self?.presentAlert(error: error)
            } else if wmsLayer.loadStatus == .loaded {
                // add the WMS layer to the map
                map.operationalLayers.add(wmsLayer)
            }
        }

        // add the source code button item to the right of navigation bar
        (navigationItem.rightBarButtonItem as! SourceCodeBarButtonItem).filenames = ["WMSLayerUsingURLViewController"]
    }
}